Attachment for internal-combustion engines



A. ELLMS.

AT'MC'IAENT FR NWERNM. CMBUSTIQN ENGINES.

AFPLECATIUN FLLE) NOV. 25, 15H8.

1,341, 17% Mmmm May Z5, 1920.

the nozzle thereoi and drawing out a cer* tain amount of i'uel, depending upon thev Volume'ot' passing said nozzle. At the same time the pistons 7 in the casing i are drawn, against the action ot' the springs ll, toward the partition of the said casing. As

soon as the suction ceases, the springs ll` f the -nii'xtures in the tivo compartments of the casing 4 lare drawn into the `engine cylinders, in addition to the hydrocarbon and 'air from the carbureter. The play now described is repeated during each cycle of operation within the 'cylinders of the engine.

lt will be observed that the attachment is, 1n fact, a pump for producing, in copera- 4tion with the carbureter, a suitable mixture Aof liquid. hydrocarbon and air, which pump the Working pistons of the engine.

is actuated by the suction produced by lt produces, however,a mixture at times when and as long :as the suction inthe intalreqnaniiiold ceases, or in other Words at times when there 'is no production omixture inthe carburetor ot' the engine.

The attachment serves also as a storage vessel,.as it were, for a mixture of air and liydroearhon, and this mixture is transferred to cylinders of the engine, when a. conrbustiole'miirture flows from the carbu7 er through the intake-manifold. Since, now- 1 ever, the mixtures from the casing 4 the carbureter ow toward each other, ihcy are effectively nuxeo. before passing to the engine.

The uniformity of the mixture is influenced by this attachment for the reason that a too lean mixture passing from the carburetor at the beginning of the suctionstrolre of a Working piston issuppleinented by the mixture stored inthe casingv a, and a too rich mixture' passing from-the carhureter at the time of the most effective vacuum in an engine cylinder is ,made more proportionate when commingled With the mixture in -said` attachment.

It is obvious that, since the quality and quantity of the combustible mixture is thus regulatedand alconiplete combustion takes y place in the cylinders or he engine, a quiet running'of the engine will be the result,

i and that the YWalis ot" the cylinders of the engine will he lrept'clear there are no .loosecarloon,particles-r flowing in the productso combustion. l

rihe'opening in the carburetor nozzle can seines be obviously made smaller than in carbureters heretofore iii use, for the reason that the time during which air rushes past the said nozzle is doubled by the attachment, consequently 'a tine spray of liquid hydrocarbon will issue trom said nozzle, which can be in a more elective Way carbureted. rihis, of course, results in a saving of fuel.

TWhen a rich mixture is required, as in case of starting, the valve l5 is set to its closing position, thereby eliminating the attachment.

if during the operation of the engine somo of its exhaust valves do not close properly, for instance if a valve or its seat is worn, the springs ll on the piston rodsl 8 Work irregular, thereby clearly indicating thel fact that. the engine valves do not close properly.

Wvhen the engine is ruiming idle, the carburetor throttle is obviously set to its ahnost closing position. in such case, a high vacuuniL is produced Within the intake-mauitold, which causes the pistons 7 in the casing +I: ot' the attachment to come to their innermost positions, in which they close the apertures l2 in said casing. Due to the high vacuum and also to the fact that the suction strokes follow each other almost without interruption, the pistons will be held in these innermost positions, so that the attachment is eliminated. This is desirable, as for idling very little -uel is needed.

`What l claim isz- 'lf' he combination with the intakeinaniiold ol an internal c/,nnbusticn engine, of a carburoter communicating therewith, a cylindrical casing having a central partition and being provided with apertures on either side ot said partition through which said casing communicates with a chamber, said chamber also communicating with said intake-manifold, a piston in each compartment of said casing adapted to reduce the space in the respective con'ipartnieut to a minimum by the suction produced in said intake-manifold 'by the Working of a piston of the engine', means disposed outside of said casing for returning said pistons to their noru al positions when the suction in said intake-inaniiold ceases, and means for closing the comniunication between said chamber and said intake-manifold, the heads of said casing being provided with openings and each ofl said .pistons having opening controlled by inwardly opening check valves adapted to be unseated when said pistons are forced against said heads.

Signed at New York, in the county of New York, and State of New York, this 1st dav of August, A. D. 1918.

ALBERT ILLIAS., 

